It's a little surprising that it took this long, considering the garbage this guy has been spewing. I'm even more surprised that no shots have yet been fired at any Trump rallies. Or none that I have heard about. The guy is practically asking for it.
From what I've seen, there is little or no security at his rallies, but I have a feeling that metal detectors and full-body cavity searches may be on the horizon.
Rachel Maddow did a pretty good piece on it.
If the link didn't work, you could go here.